Robtex

Up: 179.217.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 179.217.0.0/23
Down right: 179.217.2.0/23

IP	Type	Hostname
179.217.0.0	PTR	b3d90000.virtua.com.br
179.217.0.211	PTR	b3d900d3.virtua.com.br
179.217.0.220	PTR	b3d900dc.virtua.com.br
179.217.1.85	PTR	b3d90155.virtua.com.br
179.217.1.85	A	tgfw.ddns.net
179.217.3.138	PTR	b3d9038a.virtua.com.br